|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601 To 1200|
|Locale Reference||airport : ozw|
|Altitude||msl bound lower : 4500|
msl bound upper : 4500
|Operator||general aviation : personal|
|Make Model Name||Twin Navion|
|Operating Under FAR Part||Part 91|
|Flight Phase||cruise other|
|Function||flight crew : single pilot|
instruction : instructor
|Qualification||pilot : instrument|
pilot : commercial
pilot : cfi
|Experience||flight time last 90 days : 150|
flight time total : 12500
flight time type : 38
|Function||instruction : trainee|
|Qualification||pilot : private|
|Anomaly||aircraft equipment problem : critical|
conflict : ground critical
other anomaly other
|Independent Detector||aircraft equipment other aircraft equipment : unspecified|
other flight crewa
other other : unspecified cockpit
|Resolutory Action||none taken : unable|
|Air Traffic Incident||other|
Left engine was shut down and propeller feathered during training. Prior to check ride for multi-engine rating, the propeller did not come out of feather and the engine failed to start, with hydraulic pump being on the failed engine gear had to be pumped down. After extensive pumping and failing to get the 3 greens for gear down and locked, called on the unicom and flew by to verify the gear down, then came in for landing. The nose gear had retracted and the nose collapsed on touchdown. Manual extension effort was continued until just shortly before touchdown because there was no indication of gear safe locked down lights. Callback conversation with reporter revealed the following information: the reporter stated the maintenance action taken was replacement of the hand operated hydraulic pump and a cylinder replacement on the left engine and propeller repair for the right engine.
Original NASA ASRS Text
Title: A TWIN NAVION D16A WHILE SINGLE ENG TRAINING THE SHUT DOWN ENG FAILED TO START AND SUPPLY HYDS FOR GEAR EXTENSION. WHEN ATTEMPTING TO EXTEND THE LNDG GEAR MANUALLY THE HAND PUMP FAILED.
Narrative: L ENG WAS SHUT DOWN AND PROP FEATHERED DURING TRAINING. PRIOR TO CHK RIDE FOR MULTI-ENG RATING, THE PROP DID NOT COME OUT OF FEATHER AND THE ENG FAILED TO START, WITH HYD PUMP BEING ON THE FAILED ENG GEAR HAD TO BE PUMPED DOWN. AFTER EXTENSIVE PUMPING AND FAILING TO GET THE 3 GREENS FOR GEAR DOWN AND LOCKED, CALLED ON THE UNICOM AND FLEW BY TO VERIFY THE GEAR DOWN, THEN CAME IN FOR LNDG. THE NOSE GEAR HAD RETRACTED AND THE NOSE COLLAPSED ON TOUCHDOWN. MANUAL EXTENSION EFFORT WAS CONTINUED UNTIL JUST SHORTLY BEFORE TOUCHDOWN BECAUSE THERE WAS NO INDICATION OF GEAR SAFE LOCKED DOWN LIGHTS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE MAINT ACTION TAKEN WAS REPLACEMENT OF THE HAND OPERATED HYD PUMP AND A CYLINDER REPLACEMENT ON THE L ENG AND PROP REPAIR FOR THE R ENG.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.